FaceTime

My mom's, my dad's, and my phone are all connected to the same Apple account. One of my friends tried to

FaceTime me and it FaceTimed my phone and my dad's. Also I looked in his recent calls and every call that me and my friend have made were in his recents. Why? My friend FaceTimes me on my phone number. Not my Apple

email. They don't even have my email and my dad's FaceTime is even set up. I blocked their number on my dad's

phone so hopefully it works. My phone said earlier that day that my "iCloud storage is full". Maybe that has something to do with it? Please help!!